JP4985341B2 - Heat pump water heater - Google Patents

Description

  The present invention relates to a heat pump water heater that supplies hot water by storing heated hot water in a hot water storage tank.

  A conventional heat pump water heater will be described with reference to FIGS. The heat pump water heater includes a heat source unit 100 that heats water using a refrigeration cycle circuit and a hot water storage tank unit 200. The heat source unit 100 includes a compressor 11 that compresses the refrigerant to a high temperature and a high pressure, a water refrigerant heat exchanger 12 that heats water using the refrigerant compressed by the compressor 11, and a refrigerant that is cooled by the water refrigerant heat exchanger 12. And a evaporator 14 for evaporating the refrigerant decompressed by the decompressor 13.

  The compressor 11, the radiator 12, the decompressor 13, and the evaporator 14 are connected to each other by a refrigerant pipe 16 or the like so that the refrigerant circulates in this order to constitute a refrigeration cycle circuit. The refrigeration cycle circuit is filled with carbon dioxide (R744) as a refrigerant. A fan 15 is provided adjacent to the evaporator 14. The fan 15 supplies air to be exchanged with the refrigerant in the evaporator 14 to the evaporator 14.

  In the heat source unit 100 and the hot water storage tank unit 200, the water in the lower part of the hot water storage tank 17 provided in the hot water storage tank unit 200 is supplied to the water refrigerant heat exchanger 12 in the heat source unit 100, and then the water refrigerant heat exchange is performed. The hot water heated by the vessel 12 is connected by a pipe 19 through a circulation pump 18 so as to be supplied to the upper part of the hot water storage tank 17.

FIG. 11 is a schematic configuration diagram of the heat source unit 100, and FIG. 12 is a cross-sectional view of the AA ′ cross section in FIG. By wrapping the heat insulating material 20 around the compressor 11 and the heat insulating material 21 around the refrigerant pipe 16 between the compressor 11 and the water refrigerant heat exchanger 12, heat radiation from the compressor 11 to the ambient air is reduced, A method of efficiently heating water with the water refrigerant heat exchanger 12 has been proposed (for example, Patent Document 1).
JP 2005-221108 A

  However, the above prior art has the following problems. The refrigerant pipe 16 has a complicated shape that is three-dimensionally bent to prevent vibration of the compressor 11 and the like. For this reason, it takes time to wind the heat insulating material 20 and the heat insulating material 21 around the compressor 11 and the refrigerant pipe 16 at the time of manufacturing the heat source unit 100, and the manufacturing cost is increased.

  Furthermore, in order to obtain a greater heat insulating effect, it is necessary to increase the thickness of the heat insulating material 20 and the heat insulating material 21, and a large space is required around the compressor 11 and the refrigerant pipe 16. The size was increased and the manufacturing cost was increased.

  In order to solve the above-described problems, the present invention aims to provide a heat pump water heater that can efficiently heat water by insulating the compressor and refrigerant piping without increasing the manufacturing cost and increasing the size of the equipment. And

In order to solve the above-described conventional problems, the present invention provides a heat source unit having a refrigeration cycle in which a compressor, a water refrigerant heat exchanger, a decompressor, and an air refrigerant heat exchanger are annularly connected by a refrigerant pipe and filled with refrigerant. In the heat pump water heater provided, a pipe between the compressor and the water-refrigerant heat exchanger is surrounded by a plurality of sheet-like heat insulating materials, and at least one surface of the heat insulating material is a housing of the heat source unit The heat pump water heater is configured to be in contact with the inner surface side of the exterior plate, and a heat insulating material is individually installed in the refrigerant pipe between the compressor and the compressor having a complicated configuration and the water refrigerant heat exchanger. Therefore, it can cover most of the refrigerant pipes and insulate the refrigerant pipes from the surrounding air, so it takes time to install the heat insulating material, increasing the manufacturing cost, and a large space around the compressor and the refrigerant pipes. Necessary Without Toponpu water heater or size, to reduce heat leak from the compressor and the high-temperature portion of the refrigerant pipe, it is possible to achieve high efficiency of the heat pump water heater.

  Furthermore, because it is composed of heat insulating material in contact with the exterior plate, heat insulating material around the compressor, and heat insulating material around the pipe where hot water flows, new heat insulating material is required at these locations Without increasing the manufacturing cost.

  According to the present invention, a heat pump hot water supply that can efficiently heat water by insulating the surrounding space of the refrigerant pipe between the compressor and the water refrigerant heat exchanger without increasing the manufacturing cost or enlarging the equipment. Can provide a machine.

A first invention is a heat pump water heater provided with a heat source unit having a refrigeration cycle in which a compressor, a water refrigerant heat exchanger, a decompressor, and an air refrigerant heat exchanger are annularly connected by refrigerant piping and filled with refrigerant. The pipe between the compressor and the water-refrigerant heat exchanger is surrounded by a plurality of sheet-like heat insulating materials, and at least one surface of the heat insulating material is in contact with the inner surface side of the casing exterior plate of the heat source unit. It is characterized by the fact that most of the refrigerant piping is installed without separately installing a heat insulating material in the refrigerant piping between the compressor or the compressor having a complicated configuration and the water refrigerant heat exchanger. Covering and insulating the refrigerant piping from the surrounding air increases the manufacturing cost due to the time and effort required to install the heat insulating material, and requires a large space around the compressor and the refrigerant piping, increasing the size of the heat pump water heater. To do Ku, reduces heat leakage from the high-temperature portion of the refrigerant pipe, it can provide a heat pump water heater capable of high efficiency.

In addition, since it is composed of a heat insulating material that also serves as a heat insulating material in contact with the exterior plate, a new heat insulating material is not required at these locations, and an increase in manufacturing cost is prevented, while the high temperature of the refrigerant pipe It is possible to provide a heat pump water heater that can reduce heat leakage from the section and increase efficiency.

The second invention is characterized in that at least one end face of the heat insulating material is configured to be in contact with the inner surface side of the casing outer plate, and the heat insulating material which is also used as the heat insulating material in the portion in contact with the outer plate. Because it is composed of materials, new heat insulating materials are not required at these locations, and while preventing an increase in manufacturing cost, heat leakage from the high temperature portion of the refrigerant piping can be reduced, and high efficiency can be achieved. A heat pump water heater can be provided.

The third invention is characterized in that at least one surface of the heat insulating material is configured to be continuous with the same heat insulating material around the compressor or a member provided extending to the heat insulating material, Because it is composed of heat insulating material that also serves as the heat insulating material around the compressor, no new heat insulating material is required at these locations, preventing an increase in manufacturing costs, and heat leakage from the high temperature part of the refrigerant piping It is possible to provide a heat pump water heater that can reduce the temperature and increase the efficiency.

A fourth invention is characterized in that a plurality of sheet-like heat insulating materials surround a pipe between a water outlet part of a water refrigerant heat exchanger and a hot water pipe connection part, and the water refrigerant heat exchanger Because it is composed of a heat insulating material that also serves as a heat insulating material for the pipe between the water outlet and the hot water pipe connecting part, no new heat insulating material is required at these locations, while preventing an increase in manufacturing costs. Further, it is possible to provide a heat pump water heater capable of reducing the heat leakage from the high temperature portion of the refrigerant pipe and increasing the efficiency.

The fifth invention is characterized in that the heat insulating material is composed of at least one of glass wool, foamed urethane, vacuum heat insulating material, and felt type heat absorbing heat insulating material having a sound absorbing effect and a heat insulating effect. It is possible to provide a heat pump water heater that can reduce the heat leakage from the high-temperature part and increase the efficiency.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a heat source unit 110 of the heat pump water heater according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line AA ′ in FIG. The heat source unit 110 includes a compressor 31 that compresses the refrigerant to a high temperature and a high pressure, a water refrigerant heat exchanger 32 that heats water using the refrigerant compressed by the compressor 31, and a refrigerant that is cooled by the water refrigerant heat exchanger 32. And a evaporator 34 for evaporating the refrigerant decompressed by the decompressor 33. The compressor 31, the water-refrigerant heat exchanger 32, the decompressor 33, and the evaporator 34 are connected to each other by refrigerant piping so that the refrigerant circulates in this order, thereby constituting a refrigeration cycle circuit. The refrigeration cycle circuit is filled with carbon dioxide (R744) as a refrigerant.

  A fan 35 is provided adjacent to the evaporator 34. The fan 35 supplies the evaporator 34 with air to be heat exchanged with the refrigerant in the evaporator 34. The partition plate 41 forms part of a blower circuit through which the fan 35 blows air to the evaporator 34, so that the air blown by the fan 35 does not hit the compressor 31, the decompressor 33, and their connection piping. It is configured.

  The heat source unit 110 has a water pipe connection port 37 and a hot water pipe connection port 38 outside the casing, and the water refrigerant heat exchanger 32 includes a refrigerant inlet part 32a, a refrigerant outlet part 32b, a water inlet part 32c, It has a water outlet 32d. The refrigerant flows from the compressor 31 through the refrigerant pipe 36 through the refrigerant inlet portion 32 a, flows out from the refrigerant outlet portion 32 b, passes through the refrigerant pipe 36, and is introduced into the decompressor 33. On the other hand, the water in the hot water storage tank unit (not shown) passes through the water pipe (not shown) and is introduced into the heat source unit 110 from the water pipe connection port 37, and from the water inlet portion 32 c to the water refrigerant heat exchanger 32. It flows in and flows out as hot water from the water outlet 32d. Thereafter, the hot water exits the heat source unit 110 from the hot water pipe connection port 38, passes through the hot water pipe (not shown), and returns to the hot water storage tank unit (not shown).

  The bottom of the heat source unit 110 is configured by the substrate 42. Main components of the refrigeration cycle circuit such as the compressor 31, the water / refrigerant heat exchanger 32, and the evaporator 34 and the partition plate 41 are fixed to the substrate 42. The top of the heat source unit 110 is covered with a top plate 43. Further, the periphery of the heat source unit 110 is covered with a casing exterior plate 44 except for the portion constituted by the evaporator 34. The compressor storage unit 111 is a space that is partitioned on all sides by the partition plate 27 and a part of the casing exterior plate 32, and is vertically partitioned by a part of the top plate 44 and a part of the substrate 42.

  The compressor 31 is covered with a compressor heat insulating member 50. The compressor 31 may employ a positive displacement fluid mechanism such as a scroll type, a reciprocating type, or a rotary type. As the water refrigerant heat exchanger 32, a heat exchanger such as a double tube type or a plate type can be adopted. The evaporator 34 is an air heat exchanger represented by a fin tube type heat exchanger.

Next, the heat insulation configuration of the refrigerant pipe 36 in the heat source unit 110, which is a feature of the present embodiment, will be described. As shown in FIGS. 1 and 2, the first heat insulating member 51 and the second heat insulating member 52 are both sheet-like heat insulating materials. The first heat insulating member 51 is provided between the surface along the side surface of the compressor 31 and the side surface of the compressor 31 in the three-dimensionally bent refrigerant pipe 36. Further, the second heat insulating member 52 is provided between the surface along the front surface of the casing exterior plate 40 and the front surface of the casing exterior plate 40 in the three-dimensionally bent refrigerant pipe 36. That is, the first heat insulating member 51 and the second
The heat insulating member 52 is installed so as to cover most of the refrigerant pipe 36 and insulates the refrigerant pipe 36 from the surrounding air.

  These heat insulating materials are composed of at least one of glass wool, foamed urethane, vacuum heat insulating material, and felt type sound absorbing heat insulating material having a sound absorbing effect and a heat insulating effect.

  With the above configuration, most of the refrigerant pipe 36 can be insulated without wrapping the heat insulating material around the refrigerant pipe 36, so that it takes time to install the heat insulating material and increases the manufacturing cost, and the surroundings of the compressor 31 and the refrigerant Without requiring a large space around the pipe 36 and increasing the size of the heat source unit 110, heat leakage from the refrigerant pipe 36 can be reduced, and the efficiency of the heat source unit 110 can be increased.

  A modification of the present embodiment will be described with reference to FIGS. 3 is a vertical sectional view of the BB ′ section in FIG. 4, and FIG. 4 is a horizontal sectional view of the AA ′ section in FIG. 3. 3 and 4, the third heat insulating member 53 is provided so as to be in contact with the inner surface side of the compressor housing portion 111 of the partition plate 41. Further, the fourth heat insulating member 54 extends from a portion in contact with the inner surface side of the side surface of the casing exterior plate 40 and is provided so as to cover the upper space of the compressor 31.

  Further, the fifth heat insulating member 55 is in contact with the inner surface side of the front surface of the housing outer plate 40, and among the three-dimensionally bent refrigerant pipe 36, the surface along the front surface of the housing outer plate 40 and the housing outer plate 40. It is provided between the front of the. That is, the 3rd heat insulation member 53, the 4th heat insulation member 54, and the 5th heat insulation member 55 are installed so that the surrounding space of the compressor 31 may be covered, and the compressor accommodating part 111 is insulated from the surrounding air.

  The first heat insulating member 51 and the fifth heat insulating member 55 are installed so as to cover a space including most of the refrigerant pipe 36, and insulate the refrigerant pipe 36 from the surrounding air. According to this, since the refrigerant pipe 36 can be insulated from the surrounding air by using also the sheet-like heat insulating material (fifth heat insulating member 55) for insulating the front surface of the compressor housing portion 111, these portions are newly provided. Thus, an increase in manufacturing cost can be prevented.

  Alternatively, since the thickness of the heat insulating material on the front surface of the housing exterior plate 40 can be increased as compared with the case where the refrigerant piping 36 and the front surface of the housing exterior plate 40 are covered with separate heat insulating materials, the compressor 31 and the refrigerant piping 36 are used. Therefore, the heat source unit 110 can be highly efficient.

  Furthermore, another modification of the present embodiment will be described with reference to FIGS. 5 is a vertical sectional view of the BB ′ section in FIG. 6, and FIG. 6 is a horizontal sectional view of the AA ′ section in FIG. 5. 5 and 6, the end face of the sixth heat insulating member 56 is in contact with the inner surface side of the side surface of the casing exterior plate 40, and the surface along the side surface of the compressor 31 in the three-dimensionally bent refrigerant pipe 36. And a side surface of the compressor 31.

  That is, the 3rd heat insulation member 53, the 4th heat insulation member 54, and the 6th heat insulation member 56 are installed so that the surrounding space of the compressor 31 may be covered, and the compressor accommodating part 111 is insulated from the surrounding air. The second heat insulating member 52 and the sixth heat insulating member 56 are installed so as to cover a space including most of the refrigerant pipe 36 and insulate the refrigerant pipe 36 from the surrounding air. According to this, since the refrigerant pipe 36 can be insulated from the surrounding air by using also the sheet-like heat insulating material (sixth heat insulating member 56) for heat insulating the front surface of the compressor accommodating portion 111, new in these places. Thus, an increase in manufacturing cost can be prevented.

Another modification of the present embodiment will be described with reference to FIG. In FIG. 7, the seventh heat insulating member 57 includes a surface along the side surface of the compressor 31 in the three-dimensionally bent refrigerant pipe 36 and the compressor 3.
A part of the compressor heat insulating member 50 is extended between the one side surface and the other side surface. That is, the second heat insulating member 52 and the seventh heat insulating member 57 are installed so as to cover a space including most of the refrigerant pipe 36 and insulate the refrigerant pipe 36 from the surrounding air. According to this, since the periphery of the compressor 31 is insulated and the refrigerant pipe 36 can be insulated from the surrounding air, the increase in cost is reduced and the heat leakage from the compressor 31 and the refrigerant pipe 36 is reduced. In addition, high efficiency of the heat source unit 110 can be achieved.

  Another modification of the present embodiment will be described with reference to FIGS. 8 is a vertical sectional view of the BB ′ section in FIG. 9, and FIG. 9 is a horizontal sectional view of the AA ′ section in FIG. 8. 8 and 9, the eighth heat insulating member 58 is along the side surface of the compressor 31 among the three-dimensionally bent refrigerant pipe 36 and the pipe between the water outlet portion 32d and the hot water pipe connection port 38. It is provided between the surface and the side surface of the compressor 31.

  In addition, the ninth heat insulating member 59 includes a three-dimensionally bent refrigerant pipe 36 and a surface along the front surface of the casing exterior plate 40 of the pipe between the water outlet portion 32d and the hot water pipe connection port 38 and the casing. It is provided between the front surface of the body exterior plate 40. That is, the eighth heat insulating member 58 and the ninth heat insulating member 59 are installed so as to cover the refrigerant pipe 36 and a space including most of the pipe between the water outlet portion 32d and the hot water pipe connection port 38. The refrigerant pipe 36 and the pipe between the water outlet portion 32d and the hot water pipe connection port 38 are insulated from ambient air.

  According to this, since the piping between the water outlet portion 32d through which high-temperature hot water flows and the hot water piping connection port 38 is insulated, the refrigerant piping 36 can be insulated from the surrounding air, thereby reducing an increase in cost. And heat leakage from the compressor 31 and the refrigerant | coolant piping 36 can be reduced, and high efficiency improvement of the heat source unit 110 can be made compatible.

  The heat pump water heater of the present invention can be applied to a wide range of uses regardless of home use or business use.

Schematic front view of the heat source unit of the heat pump water heater in Embodiment 1 of the present invention AA 'sectional view of FIG. The other vertical sectional view of the heat source unit of the heat pump water heater in Embodiment 1 of the present invention AA 'sectional view of FIG. The other vertical sectional view of the heat source unit of the heat pump water heater in Embodiment 1 of the present invention AA 'sectional view of FIG. The other sectional view of the heat source unit of the heat pump water heater in Embodiment 1 of the present invention The other vertical sectional view of the heat source unit of the heat pump water heater in Embodiment 1 of the present invention AA 'sectional view of FIG. Circuit diagram of conventional heat pump water heater Schematic front view of a heat source unit of a conventional heat pump water heater AA 'sectional view of FIG.

31 Compressor
32 Water refrigerant heat exchanger 33 Pressure reducer 34 Evaporator 35 Fan 36 Refrigerant piping 41 Partition plate 44 Housing exterior plate 50 Compressor heat insulating member 51 First heat insulating member 52 Second heat insulating member 53 Third heat insulating member 54 Fourth heat insulating member 55 5th heat insulation member 56 6th heat insulation member 57 7th heat insulation member 58 8th heat insulation member 59 9th heat insulation member 111 Compressor accommodating part

Claims (5)

A heat pump water heater having a heat source unit having a refrigeration cycle in which a compressor, a water refrigerant heat exchanger, a decompressor, and an air refrigerant heat exchanger are annularly connected by refrigerant pipes and filled with refrigerant, wherein the compressor and the water The pipe between the refrigerant heat exchanger is surrounded by a plurality of sheet-like heat insulating materials, and at least one surface of the heat insulating material is configured to be in contact with the inner surface side of the housing exterior plate of the heat source unit. A heat pump hot water supply machine. The heat pump water heater according to claim 1, wherein at least one end face of the heat insulating material is in contact with an inner face side of a housing outer plate of the heat source unit. At least one surface of the insulation, as claimed in claim 1 or 2, characterized by being configured to be continuous with the member provided with extended heat insulating material and the same member or the insulation around the compressor Heat pump water heater. The heat pump according to any one of claims 1 to 3 , wherein the plurality of sheet-like heat insulating materials surround a pipe including a water outlet part and a hot water pipe connection part of the water refrigerant heat exchanger. Water heater. Insulation, glass wool, foam urethane, vacuum heat insulating material, to any one of claims 1 to 4, characterized in that is constituted by at least one acoustic insulation material of felt system with sound absorption effect and the heat insulating effect The heat pump water heater described.

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